as is mentioned above,……在这种以as引导的非限制性定语从句中,aa是什么词性?在句中作什么成分?

One topic is rarely mentioned in all the talk of improving standards in our schools: the almost complete failure of foreign-language teaching. As a French graduate who has taught for more than twenty-five years, I believe I have some idea of why the failure is so total. 21 the faults already found out in the education system as a whole — such as child-centred learning, the “discovery” method, and the low expectations by teachers of pupils — there have been several serious 22 which have a direct effect on language teaching.
The first is the removal from the curriculum (课程) of the thorough teaching of English 23 . Pupils now do not know a verb from a noun, the subject of a sentence from its object, or the difference between the past, present, or future.
Another important error is mixed-ability teaching, or teaching in ability groups so 24 that the most able groups are 25 and are bored while the least able are lost and 26 bored. Strangely enough, few head teachers seem to be in favour of mixed-ability school football teams.
Progress depends on memory, and pupils start to forget immediately they stop having 27 lessons. This is why many people who attended French lessons at school, even those who got good grades, have 28 it a few years later. Because they never need it, they do not practice it.
Most American schools have accepted what is inevitable and 29 modern languages, even Spanish, from the curriculum. Perhaps it is time for Britain to do the same, and stop 30 resources on a subject which few pupils want or need.
21. A. Due to B. In addition to C. Instead of D. In spite of
22. A. errors B. situations C. systems D. methods
23. A. vocabulary B. culture C. grammar D. literature
24. A. wide B. similar C. separate D. unique
25. A. kept out B. turned down C. held back D. left behind
26. A. surprisingly B. individually C. equally D. hardly
27. A. extra B. traditional C. basic D. regular
28. A. needed B. forgotten C. practised D. left
29. A. restored B. absorbed C. prohibited D. withdrawn
30. A. wasting B. focusing C. exploiting D. sharing

________ has been mentioned above，continued chairman after he took a sip of coffee，________ the project must be carried out before spring flood comes.

A．As；that	B．That；which
C．This；which	D．It；that

________ what you have mentioned, what else do you want?

A．In addition to

B．Except for

C．Except

D．Beside

What do you think of the reason _______ he mentioned at the meeting _______ winning this competition?

A．why; why

B．that; of

C．which; why

D．; for

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